bigpart flash error

[ATA15]

Hi!
Got another xoom that I want to put a rom on. Installed TRWP recovery. Booted into recovery and selecting install and R.A.H.+TWRPv2.6.3+BigPart_selinux.zip from the sdcard. It gives me an MD5 error. No MD5 file found. Error flashing zip.

What is wrong here?